Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

997
FXUS63 KLOT 061948
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
248 PM CDT Mon Jul 6 2026

.KEY MESSAGES...

- Dry and more seasonable conditions expected through Wednesday
  before shower and thunderstorm chances return Thursday.

&&

.DISCUSSION...
Issued at 248 PM CDT Mon Jul 6 2026

Surface high pressure will dominate across our area Tuesday
into Wednesday. The net result will be dry weather with mostly
sunny weather through midweek. Temperatures will rebound back
into the mid 80s Tuesday (70s near the lake with onshore winds)
and into the mid to upper 80s on Wednesday. While dry weather is
anticipated both days, chances for showers and thunderstorms
return to the forecast later in the week.

Later in the week, a surface cold front is forecast to slide
southward from the Upper Midwest into the lower Great Lakes.
This front will likely act as the focus for showers and
thunderstorms to our northwest Wednesday into Wednesday night,
then potentially across our area Thursday into Thursday night.
We will have to keep an eye on the threat for more locally heavy
rainfall with this activity, especially given the potential for
slow storm motions. Some lingering chances for showers and
storms will persist on Friday, though the with the effect front
likely to be shunted southward, the better focus for
precipitation Friday may largely end up well south of I-80.

This weekend into early next week, ensemble guidance supports
the building of an expansive upper-level ridge across the Plains
into the Upper Midwest. Building heat under this ridge will
result in warming temperatures (back into the upper 80s) into
our region through the weekend.

KJB

&&

.AVIATION /18Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 1240 PM CDT Mon Jul 6 2026

Expect VFR conditions through the period with high pressure
edging southeastward toward the area. NE winds around 10 knots
this afternoon will settle N/NNW under 5 knots (or become calm)
tonight as the ridge nears. Winds are then expected to
gradually return NNE by late Tuesday morning before a lake
breeze shifts winds E/ENE up to around 10 knots early in the
afternoon.

Kluber

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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